Cisco Software Developer Engineer interview questions

Played string manipulation questions a lot

String concatination, how canyou write a better concatination with out using existing menthods like .concat etc... can a dead lock happen with three threads, the job description has nothing to do with these questions. The concentration was on basics of programming, was asked to write doule linked list program...if you are comfortable with sting programs and linked list concepts it is very easy to crack